Derrick-swinger



(No Model.) W.; G. BROWN.-

DERRIGK SWINGER. A N0. 257,149'. Patented May', 1882.

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end ofthe shalt F is a pinion,a. s meshes. with ahorizontal spur-wheel,b, which lthe necessary strength.

UNITED STATES PATENT OEECE.

WALLACE C. BROWN, OF MONSON, MAINE.

DERRlcK-swlNGER.

SPECIFICATION forming part of Letters Patent |\To.` 257,149, dated May2, 1882.

Application filed March 6, 1882. (No model.) l

To all whom 'it may concern:

Be it known that I WALLACE G. BROWN, a citizen of the United States,residing at' Monson, in the county of Piscataquis and State of Maine,have invented certain new and useful Improvements in Derrick-Swingers;and I d0 hereby declare the following to bc a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings,'and toletters oriigures of referencemarked thereon,which forma part of this specilication.

My invention relates to an improvement by which the swinging or turningof a derrick or hoisting-crane can be effected. I attain that object bythe mechanism illustrated in the accompanyiug drawings, in which-`I1`igure l is an elevation of so much of a derrick or crane as isnecessary to illustrate my invention. Fig. 2 is a horizontal sect-ion online a: a: ot' I1`ig.].

f Similar letters referto similar parts throughout the several views.

The frame by means of which the derrick and rotating devices aresupported may be constructed in any approved manner and of In thedrawings it consists of the vertical pieces A A and horizontal pieces A'A2 A3 and cross-braces.

F is a shaft having a bearing in pieces A' A2 of the frame, beingsecured bythe boxingsff.

Keyed or otherwise secured to the upper This pinion is secured toderrick-postB and turns with it. Derrick-post B isslepped pivotally inthe frame, either in the upper part, A2, as shown vin Fig. 1, or,passing through thc upper part, may be pivoted in the foundation uponwhich the frame rests. Derrick-post B is also pivoted at its upper end,and is supported by guys or in any other approved manner.

The hoisting mechanism of the derrick is not shown in the drawings, asit is not essential to my invention. 1

G is a shaft mounted horizontally in pieces A A of the frame in the samevertical plane with shaft F. It is secured by boxings g g, and hasmounted upon it the belt-pulley C, to which the power is applied torotate the shaft G. Upon the shaft G are also mounted beveledfriction-wheels D D'.

On the lower end of shaft F, andv between to permit such limitedoscillation.

the friction-wheels D D', is mounted a beveled fricton-wheel,E, adaptedto be engaged alternatcly with wheels D D', or disengaged from both ofthem, by oscillating the lower end of shaft F in the vertical plane ofthe axis of the shaft G, the upper boxing,j`, being arranged The lowerend of shaft F has its bearing upon a block, I, which slideslongitudinally upon the horizontal piece A' of the main frame. The blockI slides inthe straps or ways t' i, which pass around it and are securedto the piece A'. The reciproca'tion of the block I is effected by thelever L, which is pivoted in the cross piece A' and oscillateshorizontally, having a slotted bearing in the block I, so that theoscillation of the lever L reciprocates the block I.

To the piece A of the frame is pivcted the hand-lever M, as shown inFig. 1, which oscillates vertically, and by which the block I isreciprocated by means ot' a link, L', which co'nnects the oscillatingend of the lever L to the lower end of the hand-lever M.

When it is desired to rotate the derrick the friction-wheel E is, bymeans of the hand-lever M, thrown into enga-gement with that one of themoving wheels D D' (say D', as shown in the drawings) which will rotateit in the required direction. After rotating the derrick to therequiredposition the friction-wheels can be disengaged and the movement stopped.To rotate the derrickin the opposite direction the wheel E is broughtinto engagement with the wheel D.

In place of friction-wheels, beveled-gear wheels may be used;

What Iclaim as my invention, and desire to secure by Letters Patent, is-

The combination, with a rotary derrick-post, B, having mounted thereonthe gear-wheel b, and the conthiuously-rotating power-shaft G, carryingthe friction-wheelsl) D', of the swinging shaft F, havingthefriction-wheel E, adapted to engagewith either of the wheels DD', andpinion a, meshing directly with the'gear-wheel b on the derrick-post,substantially as shown and described.

In testimon f whereof I affix mvsifuiature in Witnesses:

W. L. SAMPsoN, A. J. CUsHMAN.

IOO

